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    Dutch Master nutrient calculator

    I flood and drain rockwool cubes every three hours in veg which is six floods per 18hr light cycle. every 2hrs in flower 12hr cycle. so 6 flood and drains for 15 minutes each day both veg and flower. i have a cheap hand made set up, my e.c hovers the 1.9 and all i do is use the directions 20ml...
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